Eine galaktische Fontäne
Dieses Bild der Woche, aufgenommen mit dem Very Large Telescope der ESO, zeigt die Galaxie NGC 4383, die sich auf seltsame Weise entwickelt. Aus ihrem Kern strömt Gas mit einer schwindelerregenden Geschwindigkeit von über 200 km/s, teilweise bis zu 300 km/s. Diese mysteriöse Gaseruption hat eine einzigartige Ursache: die Sternentstehung.
Im Zentrum dieser Galaxie werden große Mengen von Sternen geboren. Die massereichsten von ihnen produzieren starke Sternwinde, verlieren dadurch im Laufe ihres Lebens an Masse und sterben schließlich in heftigen Supernovaexplosionen. Diese Sternwinde und Supernovae ziehen einen Teil des Gasreservoirs der Galaxie mit sich: Die hellen roten Fäden auf diesem Bild zeigen Wasserstoffgas, das mindestens 20.000 Lichtjahre weit von der Galaxie ausgestoßen wird. Da dieses Gas aus dem galaktischen Kern abtransportiert wird, anstatt dort zu verbleiben und für die nächste Generation von Sternen zur Verfügung zu stehen, reguliert dieser Prozess die Geschwindigkeit, mit der sich Sterne in dieser Galaxie bilden können.
Eine neue Studie unter der Leitung von Adam Watts von der University of Western Australia und dem dortigen Zweig des Internationalen Zentrums für Radioastronomie nutzte das Instrument Multi Unit Spectroscopic Explorer (MUSE) am VLT, um diese faszinierende Galaxie zu untersuchen. MUSE ermöglichte es dem Team, die chemische Zusammensetzung und die Bewegung dieses riesigen stellaren Ausflusses sehr detailliert zu kartieren und so Einblicke in die Mechanismen zu gewinnen, die den dramatischen Gasstrom auf diesem Bild verursacht haben.
Links
Bildnachweis:ESO/A. Watts et al.
Über das Bild
| ID: | potw2417a |
| Sprache: | de-at |
| Typ: | Beobachtung |
| Veröffentlichungsdatum: | 22. April 2024 02:00 |
| Größe: | 2268 x 2072 px |
Über das Objekt
| Name: | NGC 4383 |
| Typ: | Milky Way : Galaxy : Type : Spiral |
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